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The catalytic oxidation of CO on transition metals, such as Pt, is commonly viewed as a sharp transition from the CO‐inhibited surface to the active metal, covered with O. However, we find that minor amounts of O are present in the CO‐poisoned layer that explain why, surprisingly, CO desorbs at stepped and flat Pt crystal planes at once, regardless of the reaction conditions. Using near‐ambient pressure...
Einfach und praktisch: Die asymmetrische Alkinylierung von Iminen wurde durch Beispiele bereichert, bei denen Metallkatalysatoren und Wasserstoffbrücken bildende Brønsted‐Säuren zusammenwirken. Das Katalysemodell umfasst zwei parallele Zyklen: Im einen spielen Metallalkinylide (Metallkatalyse), im anderen eine chirale Brønsted‐Säure die tragende Rolle (Organokatalyse; siehe Schema; PG=Schutzgruppe).
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